Question

a car travels a distance of 180 km in 3 hours and a train travels a distance of 320 km in 4 hours. find the ratio of their speed, if
speed=distance travelled by time ​

Answer 1

AnswEr :

▣ Distance = Speed × Time

• Speed of Car :

⇒ Distance = Speed × Time

⇒ 180 km = Speed × 3 hr

⇒ 180 km / 3 hr = Speed

⇒ Speed of Car = 6 km/hr

• Speed of Train :

⇒ Distance = Speed × Time

⇒ 320 km = Speed × 4 hr

⇒ 320 km / 4 hr = Speed

⇒ Speed of Train = 8 km/hr

▣ Ratio of Speed of Car and Train

⇒ Speed of Car : Speed of Train

⇒ 6 km/hr : 8 km/hr

• Dividing Each term 2 km/hr

⇒ 3 : 4

჻ Ratio of Speed of Car and Train is 3 : 4

Answer 2

Given:

1. 180km(distance) travelled by a car in 3hours
2. 320km(distance) travelled by a bus in 4hours

✔To find:

Ratio of their speeds

$\huge{\mathcal{\blue{Answer}}}$

✔First the speed of the car:

$\large{speed=distance/time}$

$\large{speed=180km/3hours}$

$\large{speed=60km/hour.....(1)}$

✔Speed of the bus:

$\large{speed=distance/time}$

$\large{speed=320km/4hour}$

$\large{speed=80km/hour.....(2)}$

✔Now Dividing (1) and (2) :

$\large{60km/h/80km/h}$

❤Ratio of speed of car and train is

✔ 3:4